There's a few UK vehicle registration check websites, including the RAC site and HPI Check. They use the DVLA database to provide basic info about the car (engine size, year, model name), but you can also get some further information about the car from them, possibly service history and stuff like that, however you must pay for this and you must also enter the chassis number (which only the owner would know).

I don't know anything about Pacman, he's only posted one comment on this site. Although antp might be able to get his email address from when he registered.

I'm glad our site has been useful to you so far. What exactly are you trying to find out about the cars?